DianaL Boutique Black Onyx Natural Semi Precious Gemstone Shambala Style Adjustable Bracelet Black Onyx Natural Semi Precious Gemstone Shamballa Style Adjustable Bracelet Black Onyx meaning is Self control, decision-making, intuition, protection. It is about as one powerful protection stone as it absorbs negative energy of people to release mental stress and promote emotional well-being. The Stone Diameter 5/16 inch ( 8 mm). Each stone is carefully selected and well polished and passed a quality control . This Onyx Bracelet is Adjustable and fits up to 8.5 " Wrist This Bracelet comes in a Gift Box with Organza pouch . Will make a Great Gift !